Effect of CNT addition and dispersive agents on the transport properties and microstructure of cement mortars
[Display omitted] •Mortars present a refinement of pores as a function of curing time and CNT content.•Refinement is due to CNTs dispersion and deflocculating of cement by dispersants.•Small amounts of CNTs (up to 0.4 wt%) are beneficial for the transport properties.•Dispersive agents’ role is cruci...
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| Veröffentlicht in: | Construction & building materials 2019-02, Vol.197, p.251-261 |
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| container_title | Construction & building materials |
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| creator | Alafogianni, P. Dassios, K. Tsakiroglou, C.D. Matikas, T.E. Barkoula, N.M. |
| description | [Display omitted]
•Mortars present a refinement of pores as a function of curing time and CNT content.•Refinement is due to CNTs dispersion and deflocculating of cement by dispersants.•Small amounts of CNTs (up to 0.4 wt%) are beneficial for the transport properties.•Dispersive agents’ role is crucial in controlling transport of nanomodified mortars.
The current study investigates the dependence of transport properties of carbon nanotube (CNT)-modified mortars on tube content, type of dispersive agent and microstructure. CNT addition was found to result in up to 50% reduction of sorptivity, due to the refinement of pores in the mortars. No relation was found between water absorption at equilibrium, chloride diffusion and gas permeability coefficient with CNT content, dispersive agent type and microstructural parameters. The behavior was linked with the presence of high amount of dispersive agents which, not only control the level of compaction, but also chemically interact with water or methanol altering transport. |
| doi_str_mv | 10.1016/j.conbuildmat.2018.11.169 |
| format | Article |
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•Mortars present a refinement of pores as a function of curing time and CNT content.•Refinement is due to CNTs dispersion and deflocculating of cement by dispersants.•Small amounts of CNTs (up to 0.4 wt%) are beneficial for the transport properties.•Dispersive agents’ role is crucial in controlling transport of nanomodified mortars.
The current study investigates the dependence of transport properties of carbon nanotube (CNT)-modified mortars on tube content, type of dispersive agent and microstructure. CNT addition was found to result in up to 50% reduction of sorptivity, due to the refinement of pores in the mortars. No relation was found between water absorption at equilibrium, chloride diffusion and gas permeability coefficient with CNT content, dispersive agent type and microstructural parameters. The behavior was linked with the presence of high amount of dispersive agents which, not only control the level of compaction, but also chemically interact with water or methanol altering transport.</description><identifier>ISSN: 0950-0618</identifier><identifier>EISSN: 1879-0526</identifier><identifier>DOI: 10.1016/j.conbuildmat.2018.11.169</identifier><language>eng</language><publisher>Elsevier Ltd</publisher><subject>Analysis ; Chemical properties ; CNTs ; Dispersive agent ; Durability ; Mechanical properties ; Methanol ; Microstructure ; Mortar ; Mortars ; Nanotubes ; Permeability ; Pore size distribution ; Structure ; Transport properties ; Water</subject><ispartof>Construction & building materials, 2019-02, Vol.197, p.251-261</ispartof><rights>2018 Elsevier Ltd</rights><rights>COPYRIGHT 2019 Reed Business Information, Inc. (US)</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c463t-5e95a31f7677e7ddd467afb2f5aa4f4c7fe46eeda58ec31da1adf6474101d0533</citedby><cites>FETCH-LOGICAL-c463t-5e95a31f7677e7ddd467afb2f5aa4f4c7fe46eeda58ec31da1adf6474101d0533</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0950061818328605$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids></links><search><creatorcontrib>Alafogianni, P.</creatorcontrib><creatorcontrib>Dassios, K.</creatorcontrib><creatorcontrib>Tsakiroglou, C.D.</creatorcontrib><creatorcontrib>Matikas, T.E.</creatorcontrib><creatorcontrib>Barkoula, N.M.</creatorcontrib><title>Effect of CNT addition and dispersive agents on the transport properties and microstructure of cement mortars</title><title>Construction & building materials</title><description>[Display omitted]
•Mortars present a refinement of pores as a function of curing time and CNT content.•Refinement is due to CNTs dispersion and deflocculating of cement by dispersants.•Small amounts of CNTs (up to 0.4 wt%) are beneficial for the transport properties.•Dispersive agents’ role is crucial in controlling transport of nanomodified mortars.
The current study investigates the dependence of transport properties of carbon nanotube (CNT)-modified mortars on tube content, type of dispersive agent and microstructure. CNT addition was found to result in up to 50% reduction of sorptivity, due to the refinement of pores in the mortars. No relation was found between water absorption at equilibrium, chloride diffusion and gas permeability coefficient with CNT content, dispersive agent type and microstructural parameters. The behavior was linked with the presence of high amount of dispersive agents which, not only control the level of compaction, but also chemically interact with water or methanol altering transport.</description><subject>Analysis</subject><subject>Chemical properties</subject><subject>CNTs</subject><subject>Dispersive agent</subject><subject>Durability</subject><subject>Mechanical properties</subject><subject>Methanol</subject><subject>Microstructure</subject><subject>Mortar</subject><subject>Mortars</subject><subject>Nanotubes</subject><subject>Permeability</subject><subject>Pore size distribution</subject><subject>Structure</subject><subject>Transport properties</subject><subject>Water</subject><issn>0950-0618</issn><issn>1879-0526</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>N95</sourceid><recordid>eNqNkU-LFDEQxYMoOI5-h4hXu036TzJ9XIZ1FRa9rOdQk1RmM0wnQyq94Lc343jYhTlISAqS33uk6jH2UYpWCqm-HFqb4m4JRzdDaTshN62UrVTTK7aSGz01YuzUa7YS0ygaoeTmLXtHdBBCqE51Kzbfeo-28OT59scDB-dCCSlyiI67QCfMFJ6Qwx5jIV4fyiPykiHSKeXCTzlVpASkv4o52Jyo5MWWJePZ1OJclXyuMGR6z954OBJ--FfX7NfX24ftt-b-59337c19YwfVl2bEaYReeq20Ru2cG5QGv-v8CDD4wWqPg0J0MG7Q9tKBBOfVoIc6EifGvl-zTxffPRzRhOhT_bKdA1lzM2o9yn6oe82aK1TtFDMcU0Qf6vULvr3C1-WwNn5V8PmZYLdQiEj1oLB_LLSHheglPl3w8xApozenHGbIv40U5py2OZhnaZtz2kZKU9Ou2u1Fi3WsTwGzIRswWnQh13yNS-E_XP4AkIi6qA</recordid><startdate>20190210</startdate><enddate>20190210</enddate><creator>Alafogianni, P.</creator><creator>Dassios, K.</creator><creator>Tsakiroglou, C.D.</creator><creator>Matikas, T.E.</creator><creator>Barkoula, N.M.</creator><general>Elsevier Ltd</general><general>Reed Business Information, Inc. (US)</general><scope>AAYXX</scope><scope>CITATION</scope><scope>N95</scope><scope>XI7</scope></search><sort><creationdate>20190210</creationdate><title>Effect of CNT addition and dispersive agents on the transport properties and microstructure of cement mortars</title><author>Alafogianni, P. ; Dassios, K. ; Tsakiroglou, C.D. ; Matikas, T.E. ; Barkoula, N.M.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c463t-5e95a31f7677e7ddd467afb2f5aa4f4c7fe46eeda58ec31da1adf6474101d0533</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Analysis</topic><topic>Chemical properties</topic><topic>CNTs</topic><topic>Dispersive agent</topic><topic>Durability</topic><topic>Mechanical properties</topic><topic>Methanol</topic><topic>Microstructure</topic><topic>Mortar</topic><topic>Mortars</topic><topic>Nanotubes</topic><topic>Permeability</topic><topic>Pore size distribution</topic><topic>Structure</topic><topic>Transport properties</topic><topic>Water</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Alafogianni, P.</creatorcontrib><creatorcontrib>Dassios, K.</creatorcontrib><creatorcontrib>Tsakiroglou, C.D.</creatorcontrib><creatorcontrib>Matikas, T.E.</creatorcontrib><creatorcontrib>Barkoula, N.M.</creatorcontrib><collection>CrossRef</collection><collection>Gale Business Insights</collection><collection>Business Insights: Essentials</collection><jtitle>Construction & building materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Alafogianni, P.</au><au>Dassios, K.</au><au>Tsakiroglou, C.D.</au><au>Matikas, T.E.</au><au>Barkoula, N.M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of CNT addition and dispersive agents on the transport properties and microstructure of cement mortars</atitle><jtitle>Construction & building materials</jtitle><date>2019-02-10</date><risdate>2019</risdate><volume>197</volume><spage>251</spage><epage>261</epage><pages>251-261</pages><issn>0950-0618</issn><eissn>1879-0526</eissn><abstract>[Display omitted]
•Mortars present a refinement of pores as a function of curing time and CNT content.•Refinement is due to CNTs dispersion and deflocculating of cement by dispersants.•Small amounts of CNTs (up to 0.4 wt%) are beneficial for the transport properties.•Dispersive agents’ role is crucial in controlling transport of nanomodified mortars.
The current study investigates the dependence of transport properties of carbon nanotube (CNT)-modified mortars on tube content, type of dispersive agent and microstructure. CNT addition was found to result in up to 50% reduction of sorptivity, due to the refinement of pores in the mortars. No relation was found between water absorption at equilibrium, chloride diffusion and gas permeability coefficient with CNT content, dispersive agent type and microstructural parameters. The behavior was linked with the presence of high amount of dispersive agents which, not only control the level of compaction, but also chemically interact with water or methanol altering transport.</abstract><pub>Elsevier Ltd</pub><doi>10.1016/j.conbuildmat.2018.11.169</doi><tpages>11</tpages></addata></record> |
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| language | eng |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | Analysis Chemical properties CNTs Dispersive agent Durability Mechanical properties Methanol Microstructure Mortar Mortars Nanotubes Permeability Pore size distribution Structure Transport properties Water |
| title | Effect of CNT addition and dispersive agents on the transport properties and microstructure of cement mortars |
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